Crusher



April 14, 1925. 1,533,658

" R. C. NEWHOUSE CRUSHER Filed Jan. 5, 1921 -sheets-sheet 1 April 14, 1925.

R. (I. N EWHOU SE GRUSHER 4 Sheets-Sheet 2 Filed Jan. 5, 1921 April 14, 1925.

R. C. NEWHOUSE CRUSHER Filed Jafi. 5, 1921 4 Sheets-Sheet 3 April 14, 1925.

R. c. NEWHOUSE CRUSHER I Filed Jan 5, 1921 .4 sheets-sheet 4 mmvwg Patented Apr. 14, 1925.

UNITED STATES PATENT OFlCE.

RAY C. NEWHOUSE, 0F l/VAUWATOSA, WISCONSIN, ASSIGNOR T0 ALLI$-CHALMERS MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE.

OR'USHER.

Application filed January 3, 1921.

To all whom it may concern:

Be it known that RAY C. Nnwi-iousn, a citizen of the United States, residing at Yiauwatosa, in the county of Milwaukee and State of Wisconsin, has invented a certain new and useful Improvement in Crushers, of which the following is a specification.

This invention relates in general to crushers. It may be applied with particular advantage in crushers of the gyratory type.

One of the objects of the invention is the provision of a crusher which may be economically built and which is of minimum size and weight compared to its capacity. A more specific object is the reduction of the height of a crusher of given capacity whereby large amounts of metal may be saved.

Another object is the provision of a more efficient crusher and to this end the provision of means whereby the material crushed may be readily discharged from the crusher, this means being at the same time so constructed is to permit reduction of the height of the :rusher while at the same time strengthen- 1g the shell thereof; and to the same end, he provision of an efficient lubricating and oi circulating system which is not readily susceptible to failure and is moreover accessible for repairs. Ancillary to an efficient lubricating and oil circulating system, a further object is the provision of means whereby dust may be eii'ectively prevented from entering the lubricating oil and particularly the eccentric bearings of the crusher, and means whereby the eccentric and associated bearings and the oil thereon may be cooled.

Other objects will appear hereinafter as the description of the invention proceeds.

The novel features of the invention will appear from this specification and the actou'ipanying drawings forming a part thereof and disclosing several embodiments of said invention, and all these novel features are intended to be pointed out in the claims.

Fig. 1 is a vertical sectional view of a crusher em'bodying the features of the invcntion.

Fig. 9. is a plan view of the bottom shell of the crusher illustrated in Fig. 1.

i is a front elevation of the bottom shell one half thereof being shown in section, the view being taken along the line IIT-TII, F

Fig.

a is a fragmentary view taken along Serial No. 434,493.

the line IVIV of Fig. 1 and shows a pump in the oil circulating system of the crusher and the manner of driving and mounting the same.

Fig. is a fragmentary detail View of one end of the pump shown in Fi 1.

Fig. 6 is a vertical sectional view of a crus er of modified form embodying the features of the invention.

Fig. 7 is a plan view of the bottom shell of the crusher illustrated in Fig. 6, the top flange thereof being cut away.

Fig. 8 is a front elevation of the bottom shell illustrated in Fig. 7, one half thereof being in section, the view being taken along the line VIHVHI looking in the direction of the arrows, the crusher shaft and associated parts being shown in position in said shell.

The crusher illustrated in Fig. 1 comprises a top shell 1 and a bottom shell 2 adapted to support the top shell. A spider 3 is provided for carrying the crusher shaft 4 and )arts rotating therewith by means of the suspension collar 5 and the ball and socket (3, 7, comprising a suspension hearing. The crusher shaft 4i is provided with a suitable crusher head 8 which in conjunction with the concaves 9 which line shell 1, coact in the well known manner to crush the material put into the crusher.

1V ith the shaft 4 is associated an eccentric 10 having an inner bearing-surface 11 cooperating with the shaft and an outer bearing-surface 12 co-operating with the outer bearlng 13. The bearing 13 is supported by a member 14k provided with depressions 15, 16 here shown as of annular form. These depressions in conjunction with the bearing member 18 form passages in which a cooling fluid as water may be circulated for cooling the bearing and the eccentric. Water may be introduced through a pipe 1'? and be caused to circulate through the annular passage 15 and from thence through the annular passage 16 and out of a pipe 18 connected with the latter passage. The bearing supporting member 14 is in turn supported from the shell by a number of strut members one of which 19 is shown in Fig. 1. The member 1% is in addition supported as will hereinafter appear, to resist the great strains put upon it by the eccentric when the crusher is in operation.

The eccentric has a bevel gear 20 operatively associated therewith, as by means of the key 21, and the weight of this gear and the eccentric are carried by a wearing ring 22. The wearing ring 22 is supported by a bottom plate 23 which may be bolted to and supported by the bottom shell of the crusher. The bottom plate is here shown as provided with a transversely extending flanged portion 24 for supporting the wearing ring 22 and a transversely extending flanged portion 25 by means of which the bottom plate may be fastened to the bottom shell.

The gear 20 is provided with a cover plate 26 which has a downwardly opening central recess 27 with which communicate radial passages 28 having openings 29 in the upper side of the plate. While two radial passages are here shown, any desired number may be utilized. The purpose of the recess and radial passages will be hereinafter set forth.

The gear 20 is here shown as driven by a bevel pinion 30 associated with a crusher driving shaft 31. This driving shaft is supported by a bearing 32. A pump 33 which may be of the rotary gear type is mounted in the housing of the bearing 32. This pump is provided with a shaft having ends 34, extending in opposite directions out of the casing of the pump. A pinion 36 is adapted to be keyed to either the end 34 or the end 35 of the pump shaft. The pinion 36 is here shown as driven by a gear 37 rigidly associated with the driving shaft 31. The pump casing is provided with a cylindrical portion 38 adapted to be journaled in a hole 39 in a wall 40 forming part of the bearing housing. The other end of the pump casing projects through a hole 41 in a wall 42 also a portion of the bearing housing. The walls 42 are surmounted by a roof 43 which together form a housing for the pump. The end of the pump casing which projects through the wall 42 is provided with a flange 44 having holes 45 through which stud bolts are adapted to pass into the wall 42 whereby the pump may be fastened. A plan view of the pump in assembled relation to the bearing housing may be had by reference to Fig. 7, the mode of application of the pump being the same in the modified form of crusher of that figure. The suction side of the pump is connected by means of a pipe 46 through the wall 25 of the bottom plate to the annular well formed by the transverse portions or walls 24, 25 of the bottom plate and the gear 20. The dischar e side of the pump is connected by means of a pipe to the central portion of the bottom plate so as to communicate with the oil well formed by the central portion of said plate.

The bottom shell 2 of the crusher (se Figs. 2, 3) is provided with a bifurcated dis charge opening comprising the discharge openings 48, 49. These discharge openings are the bottom terminals of the diaphragm 50 (see Fig. 1). Communicating with the two discharge openings are the chutes 51, 52 respectively (see Figs. 2, The chute 51 is provided with an outer, substantially vertical, wall forming part of and merging into the cylindrical portion of the bottom shell 2. The chute 52 is similarly provided with an outer wall 54. These walls are substantially plane and are tangent to the inner cylindrical contour of the bottom shell approximately at the ends of a chord of a length almost equal to a diameter and parallel to the general plane of the discharge openings. The diaphragm includes a semiannular portion in the rear half of the bottom shell. This semi-annular portion forms an extension of the respective chutes 51, 52, inclined at a slightly greater angle as will be clear from Fig. 1. The inner portion of the diaphragm is bounded by a pipelike portion 56 of general cylindrical form preferably cast integral with the diaphragm and shell. The crusher shaft is adapted to pass through this pi ae-lilze portion as will be clear from Fig. 1. The general form of the intersection 57 between the pipe-likc portion 56 and the semi-annular portion is indicated in Fig. The pipe-like portion 56 is provided with bulges 58, 59 on each side thereof forming conoidal portions tangential to the substantially cylindrical portion of the pipe. The purpose of those bulges is explained in the copending application of A. J. Jorgensen, Serial No. 446,209, filed Feb. 19, 1921. A liner section 60 provided with oppositely inclined surfaces 61, 62 generally of triangular shape is provided at the rear of the pipe 56 and is adapted to rest upon the semi-annular portion 55. This liner section prevents lodgement of crushed material at the rear of the pipe as will be obvious.

The chute 51 is provided with an inside vertical wall 63 extending from the openings 48 to and tangent to the conoidal portion The chute is provided with an inside wall 64 extending from the opening 49 to and tangent to the conoidal portion 59. The walls 63, 64 extend down to the strut 19 and the bearing member 14 and are surmounted by a saddle-like portion (55 com prising oppositely inclined surfaces (36, 67. The saddle-like portion, the walls 63, 64 the pipe 56, the strut and bearing member 14, and bottom shell are cast integral with each other thereby forming a strong strut for the hearing.

The bottom shell 2 is provided with two side openings 63, TO and a rear opening (59. One of these openings is adapted to receive a bearing, as 32, for the crusher driving shaft, tl e remaining openings being then closed by cover plates (not shown).

The material discharged from the openmesses lugs 48, 49 may be directed upon a spout 71 (see Fi 1), which may be common to the tWO openings or not, as desired. The surface of this spout is preferably flush with the surface of liners on the diaphragm, indicated by the dotted line 73 (Fig. 1). The saddle 65 may also be provided with a liner 72, but only the liner has been shown in Figs. 2, 3 for the reason that the latter is the only one which functionally changes the effective surface of the diaphragm.

A dust ring 7s; surrounding the shaft below the crusher head is adapted to ride on the upper end of the pipe-like portion 56. and other foreign material into the eccentric bearing; surfaces and the lubricating oil, a bonnet 75 is provided. This bonnet is provided with a cylindrical ortion 76 internally telescopically associated with the eccentric 10. The bonnet is provided with a transverse flange 77 extending orer the outer bearing member 13. The outer bearing member may, to the end that the entrance of for ign material will be more effectually prevented, be also provided wise an inwardly extending fiance T8. In order to prevent the entrance of foreign material between the cylindrical portion of the honnet and the crusher shaft l, a dust ring T surrounding the said shaft provided and is formed to ertend over said cyl idrical portion 76. The bonnet may be 11;," associated in any desired manner with re eccentric and is preferably not in frictional engagement with any of the associated parts,

thus reducing Wear.

In order to provide for the passage of o as between the inner and outer bearing surfaces 11, 12 of the eccentric any number of oil passages 80, 81 may be provided. .ln order to provide for any excess of oil at the upper end of the eccentric and to preven the overrloiv thereof on to the bearing support 14, the overflow pipe 82 is provided. 'l. he upper end of this pipe passes through the upper end of the outer bearing 18 and the lower end passes through one of the struts 19 Where any oil passing through said pipe is discharged onto the surface of the gear 20.

The operation of the crusher illustrated in l to 5 inclusive i. as follows:

lVhen the crusher driving shaft 31 is rotated the crusher head is gyrated in the Well. known manner. Material. crushed by this motion drops through the spaces between the crusher head and the con eyes on to the diaphragm. Some of this material drops directly onto either the chute 51 or 552 or he semi-annular portion @n these parts the material readily slides down and hence through either openings 28 or d9 onto the discharge spout 71. Any material fal ing upon the saddle-like portion is de In order to prevent entrance of dust flected either one Way or the other by the oppositely inclined surfaces 66, 67 thereof onto either the chute 51 or 32. Material descending directly the rear of the pipe 56 Will be deflected either one way or the other by the saddle-liliie liner 60. It Will be observed that the construction is such that a clear passage is provided for the material from any point on the diaphragm to one of the discharge openings and that there is no place Where material can ldge and clog up the crusher.

In addition to the advantages above noted, the construction involving the double discharge opening permits of disposing the ccentric closer to the diaphragm, on account of the head-room afforded between the inner chuteoralls and under the saddle-like portion 65, thus shortening the crusher gen orally and the bottom shell specifically, While at the same time permitting the de sired steep ss of incline of the c-iiaphragm. The rot: ion of the crusher driving shaft in a predetermined direction causes the operation of the pumps by means of the rear 8? and the pinion 36. It may be stated that the direction of rotation. of the pinion should always be the same, the pump being of the type and irreversible. The operation of the pump causes oil to be drawn through the pipe 26, through the pump, and forced through'the pipe l? into the Well formed by the central portion of the botton plate 23. Some of this oil is forced up and out between the Wearing ring 522 and the gear 20 thus affording efiicient lubrication for these parts. The major portion of the oil pumped into the central. oil mu passes into the recess 27 and as the cover plate 26 is being murder by the gear 29 the oil in question will be thrown out through the passages 28 by centrifugal force and will be expelled from the openings 25). The pressure of the centrifugal pump will thus be added to that of the gear pump and oil emerging from the openings will be forced between the crusher sl" it and the inner bearing; 11 of the eccentric, up betvreen these surfaces to and through the passages 80, 81, down betw en the outer bearing surface of the eccentric and the bearing 18, into the gear 20. The inside the gear 20 will. ordinarily not be filled with oil inasmuch as the latter will be thrown up on the insioe surface of the gear by centrifugral force and from thence over the top ther From there the oil drops into the annular well formed. by the transversely es:- tendi. from Where it again enters the pipe 43:6. if the space the top of the outer bearin s rface of the eccen c and the bearing 10 should become full of oil, the excess will be discharged through the pipe 82 onto the gear 20, has already been pointed out,

various reasons, to change the direction of rotation of the crusher driving shaft. In-

asmuch as the shaft of the pump 33 must rotate in the same direction, means must be provided whereby this resultmay be attained when the direction of rotation of the shaft 31 is reversed. The hereinbefore described mounting for the pump 33 provides a means whereby the direction of rotation of the pump may be readily kept the same. It is only necessary to remove the pinion 36, take out the stud bolts passing through the holes into the wall l2, loosen the pipe connections l6, l? av predetermined extent, .and then rotate the pump 180 degrees so that the end of the pump shaft will assume the position of the end 3% as viewed in Fig. The pin ion 36 is then keyed to the end and the stud bolts for holding the pump in position are replaced. The pump is then in the proper relation to the shaft 31 so that the latter may be rotated in the reverse direction.

In case tne pump 8?) fails to operate for any reason, the centrifugal pump formed in the cover plate 26 is designed to provide sufiicient pressure to lubricate the eccentric at least to such an extent to prevent damage to the rotating parts should the crusher continue in operation. If the centrifugal pump is of sullicient strength to raise oil up to the top of the inner eccentric surface 11 this oil will pass through the passages 80, 81 and as before described will reach the annular well formed by the walls 24, 25. Inasmuch, however, as no oil is being drawn into the pipe 4E6 the es:- cess oil finds its way into the central well 23 between the wearing ring 22 and the gear 20.

The connection of the rotary pump 33 and the centrifugal pump 26 in series whereby they may assist each other in normal operation is a considerable factor in increasing the reliability of the lubricating system inasmuch as, should the rotary pump fail, the centrifugal pump which it is practically impossible to put outof operation, will furnish sufficient lubrication to prevent damage to the crusher, although of course, ordinarily, the lubrication by the centrifugal pump alone may not be quite so etficient as when the system operates normally.

Referring now to Fig. 6, this figure illustrates a modified form of crusher in which the features of the invention have been embodied, the construction shown being particularly adapted for crushers of larger size. The crusher in question comprises a top shell 83 and bottom shell 8%. The

bottom shell is provided with a transversely extending flange 85. The top shell is provided with a flange 86 adapted to rest upon the flan e 85, and the latter flange is adapted to rest upon a foundation or support 87. By this construction the bottom shell 84; supports only its own weight and parts hung therefrom but not the weight of the top shell, the spider, the crusher shaft and crusher head. It may be stated that the movable parts of the crusher disclosed in Figs. 6, 7, and 8 and parts directly associated therewith, including the oil circulating and lubricating system, are the same as in the crusher disclosed in Fig. 1 and these parts, for the sake of brevity, will therefore not be again described and referred to by reterence numerals. The weight of the top shell 83, and the parts carried thereby is transmitted through the flange 85 .to the foundation 8?. In View of this oonstruction it is possible to greatly reduce the size of the bottom shell 84;. The diameter of the shell 8% need not be larger than the bottom of the top shell as the broad base provided by the flange 85 provides ample stability; the bottom shell may moreover be made lighter and smaller in another respect as it supports only its own weight and directly associated parts.

Referring now more particularly to Figs. 7 and 8, the bottom shell Set is provided with a bifurcated discharge opening comprising the openings 88, S9 and another bifurcated discharge opening, located peripherally opposite to the first named bifurcated opening and comprising the openings 90, 91. These bifurcated openings form the bottom terminals of a diaphragm 92. This diaphragm comprises a pair of chutes 93, 94: the lower ends of which terminate at the openings 88, 89 respectively, and a pair of chutes 95, 96 the lower ends of which terminate at the openings 90, 91 respectively. The diaphragm is provided with a pipe-like portion 97 through which the crusher shaft is adapted to pass. The chute 93 is provided with an outer, substantially vertical, wall 98 and the chute 9 1- is similarly provided with an outer, substantially vertical wall 99. These walls form part of and merge into the cylindrical portion of the bottom shell Sat; they are substantially tangent to the inner cylindrical contour of the bottom shell approximately at the end of a chord of a length almost equal to a diameter and parallel to the general plane of the discharge openings. The chutes 95, 96 are similarly provided with outer walls 190, 101. The chute 923 is provided with an inside vertical wall 102, extending from the bottom shell to and substantially tangent with the pipe-like portion 97. The chute 94; is similarly provided with an inside wall 103. The walls 192, 103 are surmounted by a saddle-like portion comprising oppositely inclined surfaces 107, 108 extending from the bottom shell to the pipe-like portion. The chutes 95, 96 are provided with inside walls 105 extending from the shell between the openings 90, 01 to the pipe-like portion 9'? in a manner similar to that described above in connection with chutes 9-3, 9%. The walls 10 i, 105 are similarly surmounted by a saddle-like portion comprising oppositely inclined surfaces 100, 11.0. The surfaces of the diaphragm may be provided with l ne s throughout if desired and of these the liners 111, .112 disposed upon the saddle-like po tions are indicated in section in Fig. 6. The surfaces of the liners on the chutes is indi cated by the dotted line 113, Fig. (3. Each bifurcated discharge opening may be provided with a spout 114, 115 respectively, and the surface of these spouts is preferably flush with the surfaces 113 of the liners.

The operation of the crusher illustrated in Figs. 6, '7 and 8 is as follows:

As far as the action of the moving parts of the crusher is concerned including the lubricating and oil circulating system with its gear pump and centrifugal pump, the operation is the same as that set forth in connection with the crusher of Fig. 1. It will be observed that the oppositely inclined surfaces of the discharge chutes form a ridge 106 and as the material is crushed and drops through onto the diaphragn'i, a portion thereof will fall on one side of the rid ac and a substantially equal portion will fall on the other side of the ridge. li'laterial which drops directly onto the discharge chutes passes freely down the respective chute to the discharge spout; material which drops upon either one of the saddles will be deflected either one way or the other by the oppositely inclined surfaces of the saddle in question and slide freely onto one of the discharge chutes. It will be seen that the two bifurcated discharge openings provide a very large exit opening fOr the material, particularly in comparison to the size of the bottom shell and that the crushed material has a clear passage from any point on the diaphragm to one of the discharge openings. The foregoing result is accomplished without sacrificing the desired factor of strength in the bottom shell but on the contrary the shell is actually strengthened by the inside walls of the chutes and the saddles surmountingthe same forming struts. The use of two bifurcated discharge openings, moreover, permits of a still further reduction in the height of the bottom shell, the reason for this being that the inclined semi-annular portion of the diaphragm (see Fig. 1) is not necessary where two bifurcated discharge openings are utilized so that a large proportion of the vertical height of this inclined surface may be subtracted from the height of the shell.

It should be understood that it is not desired to limit the inrention to the exact details of construction herein shown and described, for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent:

1. A crusher comprising a shell having; a pair of adjacent openings in said shell wall, a bearing disposed in and adapted to transmit crushing stresses to said shell, and means including a diaphragm within said shell whereby the crushed material ClQSCQHtlS upon said diaphragm to said openings in a pair of separatiycly maintained streams.

2. A crusher comprising a shell having a pair of adjacent openings in said shell wall, and means including; a pair of straight chutes of substantially uniform width whereby the crushed material descends within said shell to said openings in a pair of separately maintain d streams.

3. i l crusher COH1}311S1D,Q a shell having a pair of adjacent openings in said shell wall, and means whereby the crushed material descends within and is discharged from said shell through aid openings in a pair of separately maintained substantially parallel streams.

4. A crusl er comprising shell haying, a pair of adjacent openings in said shell wall, means including a pair of chutes whereby the crushed material descends within and is discharged from said shell through said openings in a pair of separately maintained substantially parallel streams, and a saddlelike deflecting member between said chutes.

.5. A crusher comprising a shell, and means whereby the crushed material is dis charged in a pair of separately maintained adjacent streams including a pair of chutes for carrying said streams, a bearing; (tisposed in and adapted to transmit crushing stresses to'said shell, and means for strengtl enine' said shell comprising a strut extending between said chutes from said shell to said bearing.

6. A crusher comprisinga shell, and means whereby the crushed material is discharged in a pair of separately maintained adjacent streams including a pair of chutes for carrying said streams, and a bearing disposed in and adapted to transmit crushing stresses to said shell, the inner walls of said chutes forming a strut between said shell and said bearing.

7. A crusher comprising a shell, and means including two pairs of chutes extending from the axis of said shell to the exterior thereof whereby the crushed material is dis charged in two substantially oppositely directed pairs of separately maintained adj acent streams.

8. A crusher comprising ashell, means whereby the crushed material is discharged in two substantially oppositely directed ill pairs of non-converging adjacent independent streams, including two pairs of chutes for carrying said streams respectively, a bearing disposed in said shell, and means for strengthening said shell comprising a continuous member extending bet veen said chutes from one side of the shell to the other.

9. A crusher comprising a shell, means whereby the crushed material is discharged in two substantially oppositely directed pairs of nonconverging adjacent independ ent streams including two pairs of chutes for carrying said streams respectively, and means for strengthening said shell comprising a continuous member extending between said chutes from one side of the shell to the other, said continuous member forming the inner walls of said chutes.

10. A crusher comprising a substantially cylindrical shell having an openin in said shell wall and a straight CllSfll (llilLC within said shell the outward wall of which is tangent to the inner surface of said shell said chute communicating with said opening.

11. A crusher comprising a bottom shell having a diaphragm and an eccentric hearing, said shell being provided with a flange whereby the same may be supported, and a top shell directly supported by said flange.

12. A crusher comprising a top shell provided with crushing concaves, a bottom shell having a diameter no greater than the bottom of said top shell, a transverse flange on said bottom shell near the top thereof whereby the entire crusher may be supported, said flange directly carrying said top shell.

, 13. A crusher comprising a comparatively light bottom shell having a diameter no greater than the bottom of said top' shell, said bottom shell being provided with two adjacent independent discharge openings, a pair of discharge chutes connected with the respective openings, and means whereby a transverse portion of said bottom shell near the top thereof supports said top shell.

14. A crusher comprising a comparatively light bottom sh ll having a diameter no greater than the bottom of said top shell, said bottom shell being provided with two peripherally oppositely disposed pairs of adjacent independent discharge openings, two pairs of oppositely inclined discharge chutes cooperating with the respective pairs of openings, and means whereby a transverse portion of said bottom shell near the top thereof supports said top shell.

15. A crusher comprising a top shell provided with crushing concaves, a bottom shell incapable as a whole of supporting said top shell, a support, and means whereby the entire weight of said top shell is transmitted to said support through a portion of said bottom shell.

16. A crusher comprising a top shell portion provided with crushing concaves, a bot tom shell portion provided with a diaphragm for receiving the crushed material, and means for supporting said crusher associated therewith ata point approximately between said shell portions.

17. in a crusher of the type including a shell provided. with a diaphragm cooperating with discharge opening in said shell, said diaphragm including a pipe-like portion, a crusher shaft extending through said pipe-like portion, means within said shell for imparting a gyratory motion to said shaft, said means having portions above the central le el of said diaphragm, and means for preventing contact between said portions and said diaphragm while pern'iitting free descent of crushed material from any pointon said diaphragm toward said discharge opening.

18. In a crusher of the type including a hell provided with a diaphragm cooperatng; with a discharge opening in said shell, aid diaphragm including a pipe-like por- "ion, a crusher shaft extending through said ipe-like portion, an eccentric within said 'hell for imparting a gyratory motion to said shaft, means associated with said eccentric and above the central level of said diaphragm for preventing the entry of dustinto the eccentric bearing surfaces, and means for preventing contact between said last named means and said diaphragm.

In testimony whereof, the signature of the inventor is afiixed hereto.

RAY C. NElVHOUSE. 

